Cathodic protection coatings containing carbonaceous conductive media

A cathodic protection polymeric compound, comprising:

• (a) electrically inactive flowable material;
• (b) carbonaceous conductive media having an aspect ratio greater than 10:1 (L/W) and selected from the group consisting of carbon fibers, multiple-walled nanotubes, single-walled nanotubes, and combinations thereof dispersed in the flowable material in an amount sufficient to serve as an electron transfer agent in the electrically inactive flowable material;
• and
• (c) sacrificial metal particles also dispersed in the flowable material, wherein the sacrificial metal particles are less noble than a metal substrate to which the compound is intended to contact and wherein a combination of the metal substrate and the flowable material having the carbonaceous conductive media dispersed therein and the sacrificial metal particles dispersed therein is intended to form a passive galvanic circuit to protect the metal substrate by sacrifice of the sacrificial metal particles with the carbonaceous conductive media serving as the electronic transfer agent between the metal substrate and the sacrificial metal particles in the electrically inactive flowable material.